Tack-extracting machine for boots and shoes



NOV. 13,1923, 11,4?3,923

E. P. CORPS TACK EXTRAGTING MACHINE FOR BOOTS AND SHOES Filed Dec. 8, 1919 2 Sheets-Sheet 1 Nov. 13 1923.

E. P. CORPS TACK EXTRACTING MACHINE FOR BQOTS AND SHOES Filed Dec. 8, 1919 2 Sheets-Sheet 2 Nov. 133, i923.

TACK-EXTRACTING MACHINE FOB BOOTS AND SHOES.

Application filed December 8, 1919. Serial No. 343,357.

To (ZZZ whom 2'25 may concern Be it known that l, Enwnno PERCY Conrs, subject of the King of Great Britain, residing at Northampton, the county of Northampton, England, have invented Tack- Extracting Machines for Boots and Shoes, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to tack extracting machines for use in the manufacture of boots and shoes and the like and has for its object to produce an eflicient machine operat ing on the rotary principle for extracting lasting and similar tacks.

The invention consists of a machine hav ing a rotary extractor device composed of a pair of circular plates clamped together face to face with an intervening space said plates having formed in their opposing faces one or more (conveniently two or three) channels or grooves lying on the chords of the circular plates, the groove or grooves in. each plate combining with that or those in the opposite plate to form a passage or passages, the faces of the plates being cut away on the periphery to provide an entrance openingto said passage or passages for the tack heads, said tacks being drawn out of the work in the direction of the axis of the rotating extractor device by the passage or passages in the latter.

A guard and a clearing tool are employed in conjunction with the rotating extractordevice as will be hereinafter described.

In particularly describing the invention, reference will be made to the accompanying drawing wherein a concrete form of machine is shown by way of example.

In the drawing:

Figure 1 is a front elevation of the machine.

Figure 2 is an end elevation of the same viewed from the left of Figure 1.

Figure 3 shows the inside face of the two plates constituting the rotary track extractor device.

Figure i is a side view of the clearing tool.

Figure 5 shows in side elevation (at) front elevation (23) and. plan (6) the supplementary guard.

Figure 6 shows the arm for controlling the oscillating guard.

Figure 7 shows the stop plate for the arm.

Figures 8 and 9 illustrate the operation of the rotary extractor device.

Figure shows the supplementary guard in position for use.

The machine illustrated in the drawing comprises a frame 1 provided with bearings 52, 52 carrying a spindle 3 having thereon fast and loose pulleys 4, 5 for driving purposes. The spindle 3 has fast thereon a tack extracting device which is composed of a pair of circular plates 6, 6 (Figures 1, 2 and 8) these being clamped together face to face (in Figure 3 they are shown separated) in such a manner that the space between them maybe varied, said plates having formed in their opposing faces one or more (conveniently three as shown) chan nels or grooves 7 disposed on chords of or at an angle relatively to the periphery/ When the two plates are in position face to face the channels or grooves in oneare in alignment with those of the other plate so that they combine to form passages which pass through the pair of plates. A suitable disposition of these passages is one in which they are substantially straight throughout their length and on chords of a circle of approximately half the diameter of the plates as shown in Figure 3. f In the region of the outer end of the passages the plates 6 are cut away on their periphery and also on their opposing faces as shown at 8 in Figures 1 and 8 to provide sufficient opening to admit the head of a tack and allow the latter to be inserted far enough between the plates for the outer sides of the grooves or channels 7 to pass underneathit. The opposing faces of the plates do not meet near the periphery but are separated sufficiently to provide a space 9 (Figure l) for the shank of the tack without however allowing the head to pass between. Consequently, when, during rotation of the plates in the direction of the arrow, a tack is engaged by the undercut sides of a passage as shown in Figure 8, the head is caused to ride up to the inclined passage 7 as shown in Figure 9 and is thus withdrawn from the work towards the axis of the rotating extractor, the opposing faces of the plates 6 between the passage 7 ani periphery of the plates passing on opposite sides of the shank. Those parts of the periphery and sides of the plates which form the entrance of the passages, viz: the parts 10, 10, maybe bevelled or suitably formed to assist the extractor getting underneath the head of the tack,

To enable the extractor device to deal with tacks of ditierent thickness, the plates 6 are capable of adjustment relatively to each other to vary the width of the intervening space 9. To this end a series of screws 11 (Figure 3) in one plate may engage with recesses 12 in the opposite plate. an adjustment of the screws varying the separation of the plates. Other means may however, be adopted for this purpose.

The plates 6 are held together by a screw or other clamping means and to clear out any loose tacks from between said plates, a tool in the term of a steel plate 13 (Figures 1, 2 and l) is situated between the plates and held stationary on a pin 14 so that as the plates revolve, any tack remain ing in the passages will be caught by the tool and pushed out of the passage so that it can fall away when the end or" the pessage comes round. Conveniently the tool is pivoted in the guard about to be ,described.

The guard conveniently consists oi a member 15 bifurcated to pass on each side of the extractor device as shown in Figure 1 and formed to extend partly round the said device as shown in liigure @n its lower front side the said member may be furnished with ratchet teeth 16 which engage the work and resist any movement of the latter to which there may be a tendency caused by rotation of the extractor device while withdrawing a tack.

The guard member 15 has a shank l7 whichis slidable through a rockshatt 18 carried in a bearing 19 on the upper part of the frame 1. The rotary movement of the rockshat't is controlled by an arm 20 (Figures 2 and 6) and a spring 21 the latter being arranged between the free end of said arm and an adjusting device 22. The arm 20 passes through a stop plate 23 (Figures 2 and 7) fixed to the frame. The contact or the arm with the/ lower end otthe slot 24 in this plate determines the normal position of the guard while a screw 25 serves asan adjustable stop to limit the yielding oscillatory movement of the guard from the normal position. The shank 17 has thereon acompression spring 26 which allows the guard to yield upwardly. lVhen the work e. the insole ot a boot. is placed against the guard as indicated by dotted lines in Figure 2 for instance. the whole may be pressed towards the rotating extractor member 6, the guard aember 15 yielding by a swinging motion permitted by the rock shaft 18 and spring 21 or by an upward movementpermitted by the shank 1? and spring 26 or by both such movements tl'ierea I 1 by enabling the work to approach suthcieiitly close to the extractor device for the head ofthe tack to enter between the plates 6 as aforesaid. Upon removal of the pressure the springs return the guard to its normal position this being determined by the collar 27 and the plate 23. A set screw or other suitable means (not shown) may be provided to enable the shank to be made "fast in the rockshaft to prevent the upward yield oi the guard.

There may be provided for use on the guard 15 a supplementary guard 28 (Figure 5) having a plain front surface 29 in which is formed a slot or recess 30. The device is formed to embrace the guard 15 and by means oi slots 31 in its sides to lit upon same by engaging with pins 32, (Figures 1 and 2) so as to cover the toothed part 16 as shown in Figure 10. The sides 33 of the device 28 fit upon the outside of the guard 15. This supplementary guard is for use when, to avoid marking the face 401! the work, it is undesirable to use the toothed part 16 or"; the guard 15. When in position on the member 15 as shown in Figure 10 the supplementary device 28 provides a plain face 29 "for contact ot the work, the slot or recess 30 receiving therein the tack to be extracted. In the region of this slot the front 29 is made thin so as to allow the work to be pressed close enough to the rotating extractor device for the head of the tack to enter between the plates 6.

Claims:

1. A tack extracting machine having a rotary extractor device consisting oi a pair of circular plates clamped together face to face with an intervening space, said plates having formed in their opposing faces channels lying on chords of said pl ates, the channel in each plate combining with that in the opposite plate to form a passage, the faces of the plates being cut away on the periphery to provide an entrance opening to said passage for. the tack heads, said tacks being drawn out of the work towards the oi the rotating extractor diwice by the walls which form its passage in the latter.

2. A tack extracting machine having a ro tary extractor device consisting of a pair of circular plates clamped together face to face with an intervening space. said plates having tormed in their opposing faces chan' nels lying on chores oi" said plates. the channels in each plate combining with those in the op 1 plate to form passages, the faces the plates being cut away on the pe riphery to provide entrance openings to said passages for the tack heads, said tacks being drawn out of the work towards the axis of the rotating extractor device by the walls which form its passages in the latter.

3. A tack extracting machine having a rotary extractor device consisting of a pair of circular plates clamped together face to face with an intervening space, each plate having formed in its inner face a plurality of channels Which are substantially straight throughout their length and tangential to a circle of approximately half the diameter of the plate, the said channels in the opposing plates conjointly forming passages disposed at an angle to the periphery and adapted'to engage the tack heads to withdraw the tacks towards the axis of the rotating extractor device, the faces of the plates being cut away on the periphery to provide entrance openings to the passages for the tack heads.

A tack extracting machine having a rotary extractor device consisting of a pair of circular iplates clamped together face to face with an intervening space therebetween, channels in the opposing faces, said channels lying on chords of the plates and of the plates conjointly forming passages between the plates adapted to withdraw the tacks towards the axis of the rotating extractor device. and means to adjust the plates rela tively to each other to vary the width of the intervening space.

5. A tack extracting machine having a rotary extractor device consisting of a pair of circular plates clamped together face to f ace with an intervening space, channels in the opposing faces, said channels lying on chords of the plates and of the plates con jointly forming passages between the plates adapted to withdraw the tacks towards the axis of the rotating extractor device, and a series of screws in one of said plates engaging with recesses in the opposite plate, said screws being adjustable to vary the separation of the plates, for the purpose described.

6. A tack extracting machine having a rotary extractor device consisting of a pair of circular plates clamped together face to face with an intervening space, channels in the opposing faces, said channels lying on chords of the plates and of the plates con jointly forming passages between the plates adapted to withdraw the tacks towards the axis of the rotating extractor device, and a clearing tool to clear the removed tacks from the extractor device.

'7. A tack extracting machine having a rotary extractordevice consisting of a pair of circular plates clamped together face to face with an intervening space, channels in the opposing faces, said channels lying on chords of the plates and of the plates conjointly forming passages between the plates for extracting thetacks, and a plate held in a stationary position and situated between the opposing plates adapted to intercept loose tacks and direct same outwards from between the plates.

8. A tack extracting machine having a rotary extractor device consisting of a pair of circular plates clamped together face to face with an interventing space, channels in the opposing faces, said channels lying on chords of the plates and of the plates conjointly forming passages between the plates for extracting the tacks, and a guard member yieldingly supported in relation to the extractor device.

9. A tack extracting machine having rotary extractor device consisting of a pair of circular plates clamped together face to face with an intervening space, channels in the opposing faces, said channels lying on chords of the plates and of the plates con-- jointly forming passages between the plates for extracting the tacks, and a guard member partly surrounding the rotary extractor device mounted in a spring controlled manner and arran ed to yield relatively to the said device by an oscillating movement.

10. A tack extracting machine having a rotary extractor device consisting of a pair of circular plates clamped together face to face with an intervening space, channels in the opposing faces, said channels lying on chords of the plates and of the plates conointl formin assaces between the plates J a: e

for extracting the tacks, and a guard member partly surrounding the rotary extractor device mounted in a spring controlled manner and arranged to yield relatively to the said device by a vertical movement.

11. A tack extracting machine having a rotary extractor device consisting of a pair of circular plates clamped together face to face with an intervening space, channels in the opposing faces, said channels lying on chords of the plates and of the plates con jointly forming passages between. the plates for extracting the tacks, and a guard member partly surrounding the rotary extraotor device mounted in spring controlled manner and arranged to yield relatively to the said device by an oscillating and a vertical movement.

12. A tack extracting machine having a rotary extractor device consisting of a pair of circular plates clamped together face to face with an intervening space, channels in the opposing faces, said channels lying on chords of the plates and of the plates conjointly forming passages between the plates for extracting the tacks, a guard member partly surrounding the rotary extractor device mounted in a spring controlled manner and arranged to yield relatively to the said device, and adjustable means to limit the extent of said yielding movement.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWARD PERCY CORPS. 

